WinUAE v2.4.0 Beta 20 is released. WinUAE is the commodore amiga emulator for Windows. WinUAE is a mostly complete software emulation of the hardware of the Commodore Amiga 500/1000/2000. A Commodore Amiga, for those who don’t know, is a 16/32 bit computer system based on the Motorola 680×0 CPU and a few specially designed custom chips that provide very good graphics and sound capabilities. Its first incarnation, the A1000, appeared in 1985, followed by the highly successful A500 and A2000 models. WinUAE is a port of the originally written for Unixish systems UAE; but over time, it seems the Windows port, WinUAE has become the best version available on any platform. WinUAE is free software: you are welcome to distribute copies of it and/or modify it, under certain conditions. There is no warranty of any kind for UAE. For more details concerning these issues, please read the GNU General Public License, which describes the terms under which WinUAE is distributed.

WinUAE v2.4.0 Beta 20 Changelog:
- Fixed DirectDraw on screen led status bar surface allocation error when switching modes in some situations.
- A3000 quickstart CIA mapping fixed (no mirrors, can´t enable both CIAs at the same time, only original Gary does this) and 0xc0-0xcf added (same as A4000) Only affects very badly behaving programs, programs that most likely wouldn´t run on A3000 or A4000, with or without this change.
- Do not fully recalculate display parameters if only long/short field state changes.
- Lacenon-lace mode switch scanline flashing effect hopefully fixed (may also break something else..)
- Overlay graphics Direct3D mode should have more correct positioning again (still not exactly right)
- Z3 board <16M RAM size autoconfig data makes more sense.
- Upper half of 8M RTG Z2 board was overridden by Gayle PCMCIA address space if enabled.
- Windows 8 Consumer Preview tested, didn´t notice any problems. WARNING: No Windows 8 discussion here!

Download: WinUAE v2.4.0 Beta 20
Source: Here